Question 14 is based on the passage you have just heard.

听力原文

    Setting the office air-conditioning at about 22 degrees Celsius has become standard practice across the world. Numerous guidebooks across the world on heating, ventilation and air-conditioning claim office performance peaks at 22 degrees. Many people indeed find relief from soaring summer temperatures in air-conditioned offices, (12) [but recent studies have challenged the accepted wisdom that a cool office is more productive: the reality is more complex.] 

    Researchers conducted a review of all studies relating to air-conditioning and productivity. They found that 22 degrees was probably a little chilly, even at the height of summer. (13) [For a person dressed in typical summer clothing, an optimal range would be between 23 and 26 degrees.] And people can even tolerate temperatures beyond this “comfort zone”, as long as they can adjust their clothing and expectations. (14) [In fact, even on very hot days, it makes sense to turn the air-conditioning up.] People often chase just one “optimum” temperature. And this is understandable when people feel hot, (14) [but there is a range of at least 3 to 4 degrees which does not have any adverse impact.] 

    Another issue related to this is that people can become psychologically dependent on air-conditioning. (15) [If they are used to the environment which is air-conditioned, they tend to prefer lower temperatures.] But the studies found that almost all humans became accustomed to the new temperature. It was only at the “extreme” ends of the temperature range where people’s productivity suffered. This range was above 26 degrees and below 19 degrees.

14. What do we learn about using a little less air-conditioning during hot weather?（关于在炎热天气少用一点空调，我们能了解到什么？）

解析：A。四个选项均以It will开头，包含impact、decrease、cause等词，推测问题可能涉及某事物的影响。录音后半部分提到，即使是在非常炎热的时候，调高空调温度也是有道理的。随后又解释道，在最佳温度上下至少3到4度的范围内调整温度不会产生任何负面影响。题干中的using a little less air-conditioning（少用一点空调）对应录音中的turn the air-conditioning up（把空调温度调高），A项中的no negative impact对应录音中的does not have any adverse impact，故A项正确。

错项排除：录音中说在温度范围内调节空调温度不会有任何负面影响，其他三项内容与此相悖，故均可排除。